基于双T选频网络的电脑鼠红外检测系统

Micromouse infrared ranging system based on dual T-type frequency selecting network

本文以IEEE国际标准电脑鼠走迷宫竞赛为背景,针对目前红外检测系统多采用一体式红外接收传感器,只能判断有无障碍物、而无法进行测距,设计出基于双T选频网络的电脑鼠红外检测系统。该系统在Multisim仿真基础上,搭建硬件电路调试与测试,确定出选频网络的RC参数,采用PWM调制等措施减小外界干扰,根据接收传感器信号的强弱来判断电脑鼠与障碍物之间的距离,并拟合出测量距离与电压的关系曲线。实验验证该设计方案稳定可靠,可满足系统测距要求。

Against the background of the IEEE international standard micromouse competition through the maze, at present micromouse mostly use the integrated infrared receiving sensors which can only judge whether the barrier exist or not, but can’t measure the distance, so an infrared ranging system based on dual T-type frequency selecting network is designed. On the basis of the simulation with Multisim software, RC’s parameters of a frequency-selective network are determined by debugging and testing the hardware circuits. External interference is reduced by utilizing PWM. The distance between the micromouse and barrier is judged by the signal strength of the infrared receiving sensors. A curve between the measured distance and voltage is fitted. The results of the experiment show that the design is stable and reliable. It can meet the ranging requirements of the system.